Hi Filipe.
I'm not sure I understood your problem.
Is the default value that isn't been hidden (displaying the 01-01-1900, ie, null date), and in that case you shuld use the input attribute Null Value to a null date:

Or is while using the Prompt attribute, and maybe you're not using the right variable to which the date is binded?

Hi Filipe.
I'm not sure I understood your problem.
Is the default value that isn't been hidden (displaying the 01-01-1900, ie, null date), and in that case you shuld use the input attribute Null Value to a null date:

Or is while using the Prompt attribute, and maybe you're not using the right variable to which the date is binded?